. >> reporter: outside candlestick park, no shortage of crowd control from all ranks of law enforcement. when there's this kind of rivalry -- >> go 9ers, baby! >> reporter: extra security becomes a top priority for the san francisco police chief. he won't talk hard numbers, but did say -- >> we have about 50% more officers than in a regular non-rivalry day game out here today and probably have twice as many officers in opposing team apparel. >> reporter: that means officer disguised in seahawks jerseys monitoring the crowd inside and outside candlestick at all times. the seahawks do it at their home games and for a big game like this, now we do it too. >> if you get at anybody else, you're going to find yourself in jail and these tickets are expensive. you want to find your seat in the stadium. >> reporter: for fans, the extra security was paying off. ronnie wittenberg has broken up a pregame fight or two in his day, but not today. >> let's have fun. let's enjoy ourselves, you know? >> reporter: these sisters agree. >> i heard the area can be not so safe but i feel totally fine. we've b